Java keyboard input

When beginners learn Java, they sometimes need to receive input from the keyboard. It is easy to think of scanf () in C and CIN () in C ++. What can be used in Java? I checked many people on the internet and said that the use of system. In misled many people, including me, and someone said that the next plug-in was installed. In my opinion, the simplest way to implement it is actually a class, which Java itself provides. This class is actually a class. The following is an example:

Import java. util. collections;

/**

* Test the function of reading user input from the keyboard. The key class is "allow ".

* @ Author Administrator

*

*/

Public class testinput {

Public static void main (string [] ARGs ){

S = new partition (system. In );

System. Out. println ("enter your name :");

String name = S. nextline ();

System. Out. println ("Enter your age :");

Int age = S. nextint ();

System. Out. println ("Enter your salary :");

Float salary = S. nextfloat ();

System. Out. println ("your information is as follows :");

System. Out. println ("name:" + name + "\ n" + "Age:" + age + "\ n" + "Salary:" + salary );

}

}

Note: nextline () method of the objects to be merged receives character and string type input; nextint () receives int type; nextfloat () receives float type, I believe that you will not need to list them one by one.

Method 2:

Bufferedreader reader = new bufferedreader (New inputstreamreader (system. In ));

System. Out. Print ("Please input a number :");

String STR = reader. Readline (); // obtain the string

System. Out. println ("the number you input is:" + Str );

Or

Inputstreamreader reader = new inputstreamreader (system. In );

Bufferedreader input = new bufferedreader (Reader );

System. Out. Print ("Enter your age :");

String text = input. Readline ();

Int age = new INTEGER (text). intvalue ();

System. Out. println ("you are" + age + "years old, now ,");

Int year = 2003-age;

System. Out. println ("so you were probably born in" + year );

Io exception must be thrown.

Import java. Io .*;

-@ 5 N0 _ 4 h: C (Y: hclass javaio_02n {'u-\ 9 p1 S, C2 M-R3 P & T

Public static void main (string Param [])

# U p +] + A2 L6 o! V {: B7 A6 R3 ^ [4 ~

String nn1 = ""; // defines a string integer object nn1: B5 t) N6 E9 F4 @ 9 p

Bufferedreader distream = new bufferedreader (New inputstreamreader (system. In ));

, P1 j d/B, @ 1 L "Q6 p'a system. out. println ("type an integer"); R & M/H2 s 'q H "t (| + J

Nn1 = distream. Readline (); // input the number and store it in nn1/L, U4 Y3 E5 r \

) J + D7 N $ U; Z % V3 z7 G # S * W0 l int n1 = integer. parseint (nn1); (Z4 L # | (L/Q

If (N1% 2 = 0)

. C6 B9 U $ D * f (y! K system. Out. println (N1 + "is an even number ");

3 ?! ^ "C % C9], I-G9 A9}/B else (u-g, Z (z * {v # _; _ 0 o

System. Out. println (N1 + "is an odd number"); 2 _; B) n, Q2 \ 4 W9 D: Y $ t! E5 ~ # J

} % C! Z 'y (D6 D/V # {. _ 7 Q

}

1 F: w6 M1 h) | 8 J) O: E 'c4 E

& V "} 5 S9} & Y & l8 B

"F9 G8 K, H + A6 P % ajava cannot appear in any method, except the class

/** Created on 2005-4-5

** Todo to change the template for this generated file go

* Window-preferences-Java-code style-code templates

*/

Import java. Io. bufferedreader;

Import java. Io. ioexception;

Import java. Io. inputstreamreader;

/**

* @ Author zhangql

*

* Todo to change the template for this generated type comment go

* Window-preferences-Java-code style-code templates

*/

Public class enterconsole

{

Public static void main (string [] ARGs) throws ioexception

{

Enterconsole = new enterconsole ();

Enterconsole. printconsolechar ();

}

/**

* Receives a string from the control pair and then outputs it to the console.

* @ Throws ioexception

*/

Public void printconsoleline () throws ioexception

{

Bufferedreader BR = new bufferedreader (New inputstreamreader (system. In ));

String STR = NULL;

System. Out. println ("Enter your value :");

STR = Br. Readline ();

System. Out. println ("your value is:" + Str );

}

/**

* Receive a character from the console

* Print it to the console.

* @ Throws ioexception

*/

Public void printconsolechar () throws ioexception

{

System. Out. Print ("enter a char :");

Char I = (char) system. In. Read ();

System. Out. println ("your char is:" + I );

}

}